lO 



THE COMMON SPIDERS 



The cephalothorax is nearly as wide behind as it is long. The 

 head is about half as wide as the thorax. The eyes (fig. 30) 

 are large for so small a spider, and cover more than half 



the width of the head. The 





30 



middle eyes of the upper 

 row are oval and turned ob- 

 liquely, diverging toward the 

 front. The labium is short 

 and the maxillae straight, as 

 in Agroeca and Anyphsena, 

 but wider at the base (fig. 32). 

 The legs are long and slen- 

 der, except the tibia and metatarsus of the 

 first and second pairs, which are twice as 

 thick as the same joints of the other legs 

 and have on the under side two rows of 

 strong spines (fig. 29). The cephalothorax 

 is light yellowish, with a black line on the 

 edge each side, and two light gray stripes. 

 The abdomen is gray, with transverse white 

 markings that vary greatly in size and shape 

 in different individuals. The abdomen is 

 covered with scales that change from grayish 

 green to pink with the motions of the spider. 

 The legs are pale, except the patella and 

 tibia of the first pair, which are black or 

 dark gray, with the tip of the tibia white. 

 The tibia and patella of the second pair are 

 marked with lighter gray in the same way. 

 eight times. 29, one of It Hvcs amoHg stoncs in opcn ground, and 



the front legs to show , ,. . , j_ -ct. 



spines. 30, eyes from ruus short distanccs With great swittness. 

 in front. 32, maxiiire When Still it Hcs closc to a stouc, with the 



labium, and ends of 



mandibles. tibiae drawn up over the back. 



Figs. 29, 30, 31, 32. Phru- 

 rolithus alarius. — ^i. 

 female in a natural posi- 

 tion, with legs drawn up 

 over the back, enlarged 



